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Trari › Julian Ilett
This week on the channel +16K views this week

An upside-down resistor code gives Julian Ilett a solar puzzle

His energy-harvesting demonstration traces a flickering LED load to the wrong component on a low-cost board.

Channel: Julian Ilett Story of Trari Newsroom

Why this story? The channel's weekly summary: what went up this week, what is drawing views now, and where the channel stands among similar channels.

Playing with Energy Harvesting - BQ25504Playing with Energy Harvesting - BQ25504

Things we can learn from the video

Press to jump

  1. 0:00The BQ25504 boosts power from a single solar cell for energy harvesting.
  2. 7:18Julian introduces supercapacitors as an alternative to rechargeable batteries for storing the harvested energy.
  3. 15:35An LED load tests the board's automatic cut-off, but begins flickering rather than switching off cleanly.
  4. 19:13Julian finds a 390-ohm resistor fitted where the circuit requires a 1.43-megaohm component.
  5. 21:07Turning the correct "16E" marking upside down shows how it could have been mistaken for "391".

Why won't the light switch off cleanly? Julian Ilett's energy-harvesting experiment gets its answer from a tiny resistor marking, and a piece of paper turned upside down.

There were no new uploads this week, but "Playing with Energy Harvesting - BQ25504" remains the busiest of his featured older videos. Julian connects a small solar panel to a board built around a Texas Instruments chip, using a torch to supply light and supercapacitors to store the harvested energy. It's a workbench-sized version of the channel's promise: electronics on the cheap, electricity for free.

The snag arrives when his LED load flickers instead of cutting off cleanly. Inspecting the board, Julian finds a 390-ohm resistor where a 1.43-megaohm component should be. Then comes the explanation: the correct component's "16E" marking resembles "391" upside down. He demonstrates the resemblance on paper. A miniature electronics mystery gets a remarkably legible answer.

"Supercapacitor Adornments - HM1160 and CN3158" also continues drawing views, alongside the older "$3 Multifunction Flashlight uses TP4333". Charging, storage and inexpensive light remain a useful thread through the back catalogue.

The channel added roughly 16,000 views over the week, with subscribers unchanged. Daily viewing is slightly above its usual level. Among nearby DIY channels, Reserve Home had a much busier week and added subscribers; Julian's was the smallest weekly viewing gain in that group. His upload schedule may be empty, but the solar board has left plenty to investigate.

Published on Trari

Where next?

More from Julian IlettThis week on the channel +20K views this weekSupercapacitor add-ons keep Julian Ilett's electronics shelf busyCharging modules and an energy-harvesting board offer a catch-up week with no new uploads.Channel: Julian Ilett · Story of October 12, 2026 Also in DIY, building and homeVideo taking off 19x its usual first dayTools In Action sizes up a ceiling-saving roller attachmentKora demonstrates her father's invention in a tradeshow Short that drew far beyond the channel's usual opening audience.Channel: Tools In Action · Story of November 11, 2026 A different discovery todayVideo taking off 49x its usual first dayWomen in ITV's Power and Silence say David Walliams pursued them as teenagersTwo of the women were 15 when they met him. Walliams denies all wrongdoing, saying in a statement: "I am not a sexual predator".Channel: ITV News · Story of November 11, 2026

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The videos drawing views on Julian Ilett right now

Supercapacitor Adornments - HM1160 and CN315813,462 views $3 Multifunction Flashlight uses TP43336,329 views
The facts
Subscribers
202,000
Channel views, last 7 days
15,850
Videos published this week
0

The numbers

Here is how Julian Ilett's channel moved over the week.

views gained this week: this channel and similar channels
Reserve Home — Mallory Fl…
1,887,875
USA Inspection
603,244
Cory Mac
174,652
Cottage and Company
121,438
Datboimiggz
115,503
lexi abreu
52,783
Karly the Sparky
47,420
The aesthetic Side of hom…
46,011
Julian Ilett
15,850
subscribers
202,000
no significant change in the last 7 days
total views
60,645,859
views per day
2,395
typical day: 2,256
subscribers: this channel and similar channels
lexi abreu
212,000
The aesthetic Side of hom…
207,000
Reserve Home — Mallory Fl…
205,000
Julian Ilett
202,000
Karly the Sparky
202,000
Cottage and Company
200,000
Datboimiggz
198,000
Cory Mac
196,000
USA Inspection
193,000
As of November 11, 2026 · Data source: Trari Social News, Trari Traffic Trends and Ranking Platform, Google YouTube
Subscriber, view, like and comment counts are YouTube's. Rates, usual days, rankings, comparisons and categories are Trari's own calculations.
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💡 Test your knowledge

What does Julian use to illuminate the solar panel during his workbench demonstration?